The dialog Parametric function is used to perform the settings for plots of parametric functions.
In the groups x(t) and y(t) the setting for the abscissa an the ordinate function may be performed in the same way.
In the fields Library the paths of the shared libraries containing the functions to be chosen may be entered. The buttons right to the entry fields open file selection dialogs for this purpose.
The names of the Functions for x(t) and y(t) are entered in the corresponding fields. The functions may be chosen from a list in the dialog Functions, opened with the buttons right to the entry fields.
With the buttons a dialog
Parameter may be opened, which allows to enter the values
of up to 20 parameters of the functions. When the option
Show Function Source is activated in the Settings menu and
a C or C++ language source file with the same name as the shared library with
.cpp, respectively, is present in the same
directory, its contents is displayed right to the parameter fields, too. The
buttons open a file selection dialog for loading
the parameters from an text file (one parameter each line). The buttons
open a file selection dialog for saving the
parameters in an text file.
The limits for the function's common argument t are entered using the fields tmin and tmax. With Δt the step length for the argument is set. A value of 0 results in automatically dividing the range from tmin to tmax into 100 intervals.
The x and y values can be shifted in the presentation by entering x shift and y shift values.
Factors for x normalization and y normalization may be entered manually. These factors also may be determined automatically using with checked Normalization in the dialog Frame.
Markers (Symbol <= 0) or lines (Symbol > 0) may be chosen to present the functions. This is done most convenient using the dialog Lines and Markers, to be opened with the button right to the spin box, showing the actual representation.
The Size of lines or markers may be chosen as an additional individual factor to the global setting of the corresponding frame item.
The Color of lines or markers may be chosen using the dialog Select Color, opened with the colored button.
By choosing a Fill pattern the polygon given by the points of the function can be filled with a solid color or a pattern instead of being represented by lines or markers.
A function value table may be exported as a data file by use of the button . A file selection dialog will be opened for this purpose.
The dialog may be canceled without saving by use of the button . By using changes are saved without closing the dialog. With changes are saved and the dialog is closed.